As Harald said on that forum, they are spurs--normal on some species of snakes. Ball pythons happen to have them.
2.3 normal ball pythons
.1 ultramel motley het caramel corn snake
1. butter motley het caramel+stripe corn snake
1. fiance I had to rehome my kitty, and my dog got cancer and we put her down. RIP.(Did I forget anything??)